"The most superstitious people in the world are NFL players," former New York Giants linebacker Brandon Short, who wore the same tee-shirt under his pads throughout his undefeated high school playing days, and halfway through college at Penn State, told CNN.

"Eventually I had to let it go during my sophomore year," he admits. "We lost three games and I said, 'Okay I have to switch up; this isn't working anymore.'

"When you find something that works you stay with it, and it morphs over time," adds Short, who now works in finance while living in London.

Past and present NFL players have engaged in all kinds of preparatory rituals. Former New York Jets running back Curtis Martin read the same passage from the Bible before games, while current Giants star receiver Odell Beckham Jr. puts on a show of one-handed catches, including ones made from his back while lying in the End Zone.

Former Jacksonville Jaguars defensive tackle John Henderson went a step further, imploring trainers to slap him across the face before stepping onto the field every Sunday.

Short would keep things simple by sticking to the same pregame meal of egg whites, before dipping into the irrational by deliberately disposing of his hotel room key-card on the way to the team bus.

How that translated to Giants wins is anyone's guess, although Short rode the habit all the way to the 2001 Super Bowl in his rookie season.

"There were big games when I forgot to throw the key away, and I was sure that we lost simply because I forgot to throw it in the trash before the game," he recalls.

Good vibes on game days

NFL players even dictate who they allocate their game tickets to based on previous results, says Short.

"If you are on a winning streak and you invite a certain group of people to a game, you invite those same people back to the next game because they are good luck," he says, adding that if there was a newcomer who showed up for a loss, he or she would not be invited back.

"Sports is superstition; it's ritual," says Short, who played five seasons with the Giants and two with the Carolina Panthers. "That's also what practice is: You do the same stuff over and over again, and if it works then don't change it."

And that goes for fans too.

Ask most NFL diehards what they endure to generate good vibes on game days, and answers will vary between wearing worn-out jerseys, to arranging furniture in a certain way, to avoiding food that clashes with their team's colors.

But it gets even weirder.

Photos:American football's big earners

Though Tom Brady (right) is considered one of the greatest players in history, Joe Flacco out-earns him by over $1.6 million this season. Here are the top 20 highest-paid NFL players for 2016, based on average yearly salaries in their contracts. (Source: NFL.com)

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No. 20: Matthew Stafford, $17.67 million – Stafford has managed just two winning seasons out of his seven in the league -- though he has endured a weak supporting cast. The Detroit Lion QB posted an excellent 2015 (32 TDs, 13 INT, 97 QBR), and is riding an 82-game starting streak, 19th best of all time.

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No. 19: Brock Osweiler, $18 million – The new Houston Texans quarterback served four years as Peyton Manning's understudy in Denver, and compiled a 5-2 record as a starter when Manning went down with an injury during last year's Super Bowl season. Interestingly, Denver GM John Elway didn't see Osweiler as a permanent replacement for the retired Manning. "He had an opportunity to make a tremendous amount of money in Houston, and for us, it just didn't fit," Elway told the Denver Post.

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No. 18: Tony Romo, $18 million – Two playoff wins in 13 seasons, along with a litany of injuries to Romo, have Dallas fans reaching for their prayer beads yet again. Romo's broken collarbone in week 2 effectively killed the 2015 season -- Dallas went 0-8 without him -- and he's out another six to 10 weeks this year with a broken bone in his back.

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No. 17: Jay Cutler, $18.1 million – The enigmatic Cutler (#6) is .500 lifetime as a starter (68-68), and has made the playoffs just once, in 2010. Since then the Bears have had just one winning season. "Jay Cutler has gotten a lot of offensive coordinators fired, let's be honest," mused NFL analyst Marshall Faulk.

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No. 16: Colin Kaepernick, $19 million – If salaries were adjusted for headlines, Kaepernick would be at the top of the list. The former University of Nevada two-way threat led the San Francisco 49ers to a near-Super Bowl win in just his 10th career start in 2013. Though Kaepernick lost his starting job to Blaine Gabbert after an injury last season, he rocked the league by refusing to stand for the national anthem during the 2016 preseason as a statement against racial injustice.

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No. 15: Ndamukong Suh, $19.1 million – The former Detroit Lions pass rusher (#90), now with the Miami Dolphins, is the first non-quarterback on the list. Suh was signed for a six-year, $114 million contract in March 2015 ($60 million guaranteed), making him the highest paid defensive player in history at the time -- hefty numbers for a 29-year-old lineman with 42 career sacks.

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No. 14: Von Miller, $19.1 million – Last season's Super Bowl MVP for the Denver Broncos single-handedly badgered Panthers quarterback Cam Newton into submission, with 6 tackles, 2.5 sacks, 2 forced fumbles and 2 quarterback hurries in the title game. Miller promptly signed a $114.5 million deal ($70 million guaranteed) with the Broncos, making him the richest defensive player in NFL history.

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No. 13: Ryan Tannehill, $19.25 million – A former part-time receiver in college at Texas A&M, Tannehill (#17) is one of the speediest quarterbacks in the league. He's started every game since turning pro four years ago, but has yet to lead the Miami Dolphins into the playoffs. In a 44-26 win against Houston in 2015, Tannehill became the 64th quarterback in NFL history to record a perfect passer rating, throwing 4 TDs, with 18 completions in 19 attempts.

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No. 12: Kirk Cousins, $19.95 million – In his fourth NFL season, Cousins finally won the starting spot from Robert Griffin III and led the Washington Redskins to the playoffs in 2015. The timing was good, as Cousins' contract was up, prompting a one-year, $19.95 million deal from the 'Skins.

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No. 11: Drew Brees, $20 million – It's hard to overestimate Brees' value to the city of New Orleans. When the former Charger joined the Saints in 2006, the year after Hurricane Katrina, the team was 3-13. Four years later, New Orleans won its first and only Super Bowl. Brees has been a Pro Bowler in eight out of his 10 seasons in the Big Easy, and holds team passing records in every major category. He has also been a face of the community, raising funds for cancer research and other charitable causes.

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No. 10: Tom Brady, $20.5 million – With four Super Bowl rings, 11 Pro Bowls and two NFL MVP awards, Brady is the one player in the list who can claim to be underpaid. At 39, he's riding a two-year, $41 million contract ($28 million guaranteed), but has left money on the table in previous negotiations to sign better players around him -- a plan that has yielded a record six Super Bowl appearances and counting.

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No. 9: Matt Ryan, $20.75 million – "Matty Ice" has also been "Matty Dependable," as Ryan has missed just two games in his eight-year career. The former Boston College standout and three-time Pro Bowler was inserted as the Atlanta Falcons' starter from day one, taking them to the playoffs four times. Ryan's postseason record is just 1-4, however; the sole win coming against the Seahawks in a 2013 conference semifinal.

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No. 8: Cam Newton, $20.76 million – Newton is arguably the most complete player on this list. At 6 foot 6 inches and 260 pounds, he has the size, speed and athleticism -- along with killer QB instincts -- to take the Carolina Panthers into the playoffs every year. He's also shown marked improvement, leading the Panthers to a 15-1 record in 2015. Newton, of course, will want to erase his disastrous Super Bowl 50 (0 touchdowns, 1 interception, sacked 6 times, 2 fumble losses) with another blistering start in 2016.

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No. 7: Philip Rivers, $20.81 million – In his 12-year pro career, Rivers has yet to appear in a Super Bowl, although he has taken the San Diego Chargers into the playoffs five times. The father of eight children has broken most of the major franchise records, surpassing Dan Fouts as the Chargers' all-time touchdown leader, wins leader and consecutive starts leader (160 and counting). In 2014, Rivers broke an NFL record by achieving five consecutive games with a passer rating of above 120.

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No. 6: Eli Manning, $21 million – The two-time Super Bowl MVP is quietly coming off the best statistical season of his 12-year career (35 TDs, 14 INTs, 93.6 RTG), though the Giants missed the playoffs for the fourth year running. At times, Manning has befuddled New Yorkers with error-prone performances (as recently as 2013 he threw 27 INTs), but his legacy is cemented in New York sporting lore. If Victor Cruz and Odell Beckham can stay healthy in 2016, Manning will be operating with the most dangerous receiving corps in the league.

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No. 5: Ben Roethlisberger, $21.85 million – "Big Ben" (#7) is the third consecutive quarterback on this list from the vaunted class of 2004. Like Manning, Roethlisberger has earned two Super Bowl rings and four Pro-Bowl appearances, though he has suffered some niggling injuries along the way. The 34-year-old missed four games in 2015 but came back to battle in the playoffs, losing to eventual champions the Denver Broncos in the conference semifinals.

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No. 4: Russell Wilson, $21.9 million – It's ironic that Wilson threw the most famous interception in NFL history -- the last-minute gaff which cost the Seattle Seahawks the 2015 Super Bowl -- because the 27-year-old three-time Pro Bowler plays virtually error-free. Though standing at just 5 foot 11 inches, Wilson was the top-rated NFL quarterback in 2015, and is second all-time, trailing only Aaron Rodgers.

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No. 3: Aaron Rodgers, $22 million – That Rodgers holds the top career passer rating record while playing in frozen Lambeau Field is a testament to his talent. Rodgers led the Green Bay Packers to a 2011 championship, and is riding a seven-year playoff streak into 2016. But despite posting stellar regular-season numbers in the five seasons since the Super Bowl (a mind-boggling 170 TDs and just 33 INTs) the Packers have come up short in the playoffs.

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No. 2: Joe Flacco, $22.13 million – The Baltimore Ravens offering three-year, $66.4 million ($44 million guaranteed) deal to a quarterback who has never made the Pro Bowl in nine seasons seems like an aberration. But traditionally the Ravens have thrived on defense, and until Flacco came along in 2008, the team won in spite of its sputtering quarterbacks. The 2013 Super Bowl MVP brings a calm presence to a team which suffered a leadership vacuum after the retirements of Ed Reed and Ray Lewis.

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No. 1: Andrew Luck, $23.33 million – Before last season, Luck looked like the heir-apparent to Tom Brady and Peyton Manning as the face of the league. But an injury-riddled 2015 (shoulder and rib problems, lacerated kidney, torn abdomen) kept him out of nine games, leaving the Indianapolis Colts out of the playoffs for the first time since making Luck the top pick of the 2012 draft. The Colts were confident enough to sign Luck to a six-year extension worth $140 million ($87 million guaranteed), and say he is fully fit for 2016.

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"I can't sit; I need to stand for the entire game when I watch the Jets. I also need to hold a football," says Ryan Packert, an environmental spray tech from Floral Park, New York. "It drives my wife nuts."

In order to placate his vegetarian wife, Packert remembers to make her tofu nuggets each week to accompany his ritual of chicken wings.

David Lawson, a school teacher in Fort Lauderdale, Florida, makes sure he is wearing the same Dallas Cowboys jersey, along with any other items of clothing, the week after a win (although he does allow washing) -- but there's more.

"Where it gets tricky is if I'm at a bar," he explains. "Trying to get the same booth or bar stool can be challenging. For that I recommend making friends with the bartender, using either dollars, charm, or both."

Meanwhile, sales executive Jana Owen from Austin Texas never forgot to dress up her late five-pound Pomeranian dog Korbelle in a miniature blue Cowboys jersey before a game.

"I started dressing her in Cowboys gear when she was just eight months," Owen said of Korbelle, who died last year in a car accident. "For a couple seasons I swore it did bring us good luck. But come on, it's the Cowboys. Nothing gives them good luck!"

Lucky underwear

A survey showed 65% of NFL fans practice a pregame ritual that they think brings their teams good luck, according to market researcher OnePoll, with 10% percent confessing to owning lucky underwear which they stash away for games.

Most fans admit to altering something in the middle of a game to try to rally their teams back -- including having sex in front of the television -- while nearly 14% refuse to watch games entirely for fear of bringing their teams bad luck.

Of the 2,000 sports fans polled anonymously on behalf of restaurant chain Hooters, one man says he dated a woman he did not like in order to end his team's losing streak. Another moved out of his apartment. Someone even drank a gallon of expired milk to bring his team good luck.

Most NFL fans also said losing puts them in a bad mood -- so much so that 22% of their friends and family avoid them after a loss.

One respondent bet against his own team to try to shake off a losing streak, but that pales in comparison to the lengths fantasy team owners will do to win their leagues.

Over half of NFL fantasy league participants wake up in the middle of the night to adjust their rosters, while one in seven say they would have sex with someone in exchange for a great fantasy trade, according to the survey.